local ls = require('luasnip')

local s = ls.snippet
local t = ls.text_node

return {
  -- Superscripts
  s(
    { trig = [[\^+]], wordTrig = false },
    t("⁺")
  ),
  s(
    { trig = [[\^-]], wordTrig = false },
    t("⁻")
  ),
  s(
    { trig = [[\^0]], wordTrig = false },
    t("⁰")
  ),
  s(
    { trig = [[\^1]], wordTrig = false },
    t("¹")
  ),
  s(
    { trig = [[\^2]], wordTrig = false },
    t("²")
  ),
  s(
    { trig = [[\^3]], wordTrig = false },
    t("³")
  ),
  s(
    { trig = [[\^4]], wordTrig = false },
    t("⁴")
  ),
  s(
    { trig = [[\^5]], wordTrig = false },
    t("⁵")
  ),
  s(
    { trig = [[\^6]], wordTrig = false },
    t("⁶")
  ),
  s(
    { trig = [[\^7]], wordTrig = false },
    t("⁷")
  ),
  s(
    { trig = [[\^8]], wordTrig = false },
    t("⁸")
  ),
  s(
    { trig = [[\^9]], wordTrig = false },
    t("⁹")
  ),

  -- Subscripts
  s(
    { trig = [[\_+]], wordTrig = false },
    t("₊")
  ),
  s(
    { trig = [[\_-]], wordTrig = false },
    t("₋")
  ),
  s(
    { trig = [[\_0]], wordTrig = false },
    t("₀")
  ),
  s(
    { trig = [[\_1]], wordTrig = false },
    t("₁")
  ),
  s(
    { trig = [[\_2]], wordTrig = false },
    t("₂")
  ),
  s(
    { trig = [[\_3]], wordTrig = false },
    t("₃")
  ),
  s(
    { trig = [[\_4]], wordTrig = false },
    t("₄")
  ),
  s(
    { trig = [[\_5]], wordTrig = false },
    t("₅")
  ),
  s(
    { trig = [[\_6]], wordTrig = false },
    t("₆")
  ),
  s(
    { trig = [[\_7]], wordTrig = false },
    t("₇")
  ),
  s(
    { trig = [[\_8]], wordTrig = false },
    t("₈")
  ),
  s(
    { trig = [[\_9]], wordTrig = false },
    t("₉")
  ),
  s(
    { trig = [[\_a]], wordTrig = false },
    t("ₐ")
  ),
  s(
    { trig = [[\_i]], wordTrig = false },
    t("ᵢ")
  ),
  s(
    { trig = [[\_j]], wordTrig = false },
    t("ⱼ")
  ),
  s(
    { trig = [[\_k]], wordTrig = false },
    t("ₖ")
  ),
  s(
    { trig = [[\_m]], wordTrig = false },
    t("ₘ")
  ),
  s(
    { trig = [[\_n]], wordTrig = false },
    t("ₙ")
  ),

  -- Lists
  s(
    { trig = [[\.]], wordTrig = false },
    t("·")
  ),
  s(
    { trig = [[\circ]], wordTrig = false },
    t("∘")
  ),

  -- Arrows
  s(
    { trig = [[\d]], wordTrig = false },
    t("↓")
  ),
  s(
    { trig = [[\l]], wordTrig = false },
    t("←")
  ),
  s(
    { trig = [[\lr]], wordTrig = false },
    t("↔")
  ),
  s(
    { trig = [[←r]], wordTrig = false },
    t("↔")
  ),
  s(
    { trig = [[\r]], wordTrig = false },
    t("→")
  ),
  s(
    { trig = [[\u]], wordTrig = false },
    t("↑")
  ),

  -- Greek letters
  s(
    { trig = [[\a]], wordTrig = false },
    t("α")
  ),
  s(
    { trig = [[\b]], wordTrig = false },
    t("β")
  ),
  s(
    { trig = [[\g]], wordTrig = false },
    t("γ")
  ),
  s(
    { trig = [[\e]], wordTrig = false },
    t("ε")
  ),
  s(
    { trig = [[\pi]], wordTrig = false },
    t("π")
  ),
  s(
    { trig = [[\s]], wordTrig = false },
    t("σ")
  ),
  s(
    { trig = [[\z]], wordTrig = false },
    t("ζ")
  ),

  -- Other operators
  s(
    { trig = [[\not]], wordTrig = false },
    t("¬")
  ),
  s(
    { trig = [[\and]], wordTrig = false },
    t("∧")
  ),
  s(
    { trig = [[αnd]], wordTrig = false },
    t('∧')
  ),
  s(
    { trig = [[\or]], wordTrig = false },
    t("∨")
  ),
  s(
    { trig = [[\iff]], wordTrig = false },
    t("⇔")
  ),
  s(
    { trig = [[\imp]], wordTrig = false },
    t("⇒")
  ),
  s(
    { trig = [[\cap]], wordTrig = false },
    t("∩")
  ),
  s(
    { trig = [[\cup]], wordTrig = false },
    t("∪")
  ),
  s(
    { trig = [[\leq]], wordTrig = false },
    t("≤")
  ),
  s(
    { trig = [[←eq]], wordTrig = false },
    t("≤")
  ),
  s(
    { trig = [[\geq]], wordTrig = false },
    t("≥")
  ),
  s(
    { trig = [[γeq]], wordTrig = false },
    t("≥")
  ),
  s(
    { trig = [[\in]], wordTrig = false },
    t("∈")
  ),
  s(
    { trig = [[\notin]], wordTrig = false },
    t("∉")
  ),
  s(
    { trig = [[¬in]], wordTrig = false },
    t("∉")
  ),
}